Sorry to rain on everyone's parade

, but I'm not so sure about getting any "superior" performance out of this one. If you look closely you'll see that the water enters and exits the block very quickly even though it's extensively channeled. Reminds me somewhat of the silverbase WB over @ Becooling in how much it's channeled.
http://becooling.safeshopper.com/6/95.htm?896
Also, I don't see
very much turbulence to aid in the heat transfer with these kind of conditions. Looks cool though

. What Brad said about them trying to even out the flow is interesting, I think he's right about that.